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Old 03-24-2005, 09:04 PM
mototools
 
Join Date: Mar 2005
Location: Northern Virginia
Posts: 6
Timing Chain Upper Guide

Hello Diesel Forum,

My 93 300SD is making a thwacky/clacky sound near the front of the engine, and since it has traveled 153K miles I decided to inspect/change the Timing chain. On visual inspection all looks well, but I noticed that the upper timing chain guide has 1/8-inch lateral play (sliding on its mounting pins), and if you give it a poke it will make a clacky sound when it bounces back and forth.
Question: how much play is normal?
I purchased a new guide with the chain so was planning on changing it.
Question2: How are the Guide pins located and secured?

Thanks,

Rob Little
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